单项选择题


A．Spring.
B．Winter.
C．Summer.
D．Autumn.
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单项选择题
It is well known that Thomas Edison ______ the electric lamp.
A．invented
B．discovered
C．found
D．developed
单项选择题
______ leaves the. classroom should tell me.
A．Anyone
B．None
C．Whoever
D．Everyone
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